more cert test changes [#140155805](https://www.pivotaltracker.com/story/show/140155805)
more cert test changes
[#140155805](https://www.pivotaltracker.com/story/show/140155805)

Signed-off-by: Julian Hjortshoj <a84af1ff40fcfa3bc4844358f827e17a8b38c426@emc.com>

cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release